Paper: Disambiguation Of Morphological Structure Using A PCFG

ACL ID H05-1065
Title Disambiguation Of Morphological Structure Using A PCFG
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2005
Authors

German has a productive morphology and allows the creation of complex words which are often highly ambiguous. This paper reports on the development of a head-lexicalized PCFG for the disam- biguation of German morphological anal- yses. The grammar is trained on unla- beled data using the Inside-Outside algo- rithm. The parser achieves a precision of more than 68% on difficult test data, which is 23% more than the baseline ob- tained by randomly choosing one of the simplest analyses. Remarkable is the fact that precision drops to 52% without lexi- calization.